https://sites.google.com/site/trueketosa...Keto-Sample.jpg You may have heard about the benefits of diet and exercise ad nauseam, but may be unaware of the effect that your emotions can have on your physical well-being and, indeed, your longevity. Like physical health, mental health is important at every stage of life. Mental health is how we think, feel, and act in order to face life's situations. Prolonged psychological stress may have a negative impact on health, such as weakening the immune system.